Navigation equipment can't work in the tunnel due to the lack of satellite navigation signals. In order to solve this problem, a two-dimensional positioning method using multimode simulator and leakage cables is proposed. The multimode satellite navigation simulator generates three kinds of signals: GPS, BDS and GLONASS. Then, these signals respectively excite the leakage cables in parallel direction. The secondary processing algorithm is applied to the pseudorange data from the navigation receiver, which reduces the special requirements of satellite constellation, satellite almanac and pseudorange delay. The multi-system satellite clock joint positioning algorithm based on forgetting factor is adopted to realize two-dimensional positioning and avoid data saturation. Through experiments, 80% error is within 1.6 m, and 90% error is within 2 m. The results show that this positioning algorithm can achieve two-dimensional positioning in the tunnel.