We obtained three new full BVRI light curves for two eclipsing binaries V1094 Her and MT Cas on nine nights from 2015 to 2018 using two optical telescopes. We analysed the orbital period variations using all available light curve minima, seven of which were from our work. For V1094 Her, we found that there is a cyclic variation overlaying a continuous period decrease. The cyclic variation of V1094 Her may be caused by the light-time effect by a third body of \(P_{3}=13.2(\pm 1.2)\) yr or magnetic activity cycle with \(T=15.1(\pm 0.8)\) yr. The decreasing period of V1094 Her can be explained by either mass exchange \({\dot{M}}_{2}=-2.20\times 10^{-7}\; M_{\odot }\)/yr for a third body or \({\dot{M}}_{2}=-2.03\times 10^{-7}\; M_{\odot }\)/yr for magnetic activity cycle. We confirmed there exist a period increase for MT Cas. For MT Cas, the secular decrease of period can be explained by the mass exchange \({\dot{M}}_{1}=-1.09\times 10^{-8}\; M_{\odot }\)/yr (including angular momentum loss of \({\dot{M}}=-5.99\times 10^{-11}\; M_{\odot }\)/yr). We obtained the orbital parameters for V1094 Her using the Wilson & Devinney program for the first time. For MT Cas, we updated their orbital parameters, which are similar to the results from previous work. We concluded that V1094 Her and MT Cas are contact eclipsing binaries with low contact factors and period variations.

在2015年至2018年的九个晚上，我们使用两个光学望远镜为两个遮盖双星V1094 Her和MT Cas获得了三个新的完整BVRI光曲线。我们使用所有可用的光曲线最小值分析了轨道周期变化，其中七个来自我们的工作。对于V1094 Her，我们发现有一个周期性变化叠加了一个连续的周期下降。V1094 Her的周期性变化可能是由\（P_ {3} = 13.2（\ pm 1.2）\） yr的第三体的光时间效应或\（T = 15.1（\ pm 0.8 ）的磁活动周期引起的）\）年。V1094 Her的下降周期可以用质量交换\（{\ dot {M}} _ {2} =-2.20 \ times 10 ^ {-7} \; M _ {\ odot} \） / yr来解释。第三实体或\（{\ dot {M}} _ {2} =-2.03 \ times 10 ^ {-7} \; M _ {\ odot} \）/ yr用于磁活动周期。我们确认MT Cas的期限有所增加。对于MT Cas，周期的长期减少可以用质量交换\（{\ dot {M}} _ {1} =-1.09 \ times 10 ^ {-8} \; M _ {\ odot} \） /来解释yr（包括角动量损耗\（{\ dot {M}} =-5.99 \乘以10 ^ {-11} \; M _ {\ odot} \） / yr）。我们首次使用Wilson＆Devinney程序获得了V1094 Her的轨道参数。对于MT Cas，我们更新了它们的轨道参数，与先前工作的结果相似。我们得出的结论是，V1094 Her和MT Cas是具有低接触因子和周期变化的接触蚀二进制。