Abstract: in order to solve leakage problems of hydraulic powered suppor legs and hyrauli jacks caused by fallre of rubber sea in the coal mine a study on compatiblity between the mine concentrated liuid and the ruber was conducted and the paper invesigaled ubrcty f diffrent type acdtives and th infutences onitrie butadiene rubber and polyurethane ruber.With fest and measurement of the volume,hardness fensle strength and breaking elongation rate of ruber afer the imersion,the compatility between the mine concentrated liuid and the ruber mateial was judged.The testresuis showed that composion modifed plant il L and ⅡT both had an excellent cllaborative lubrct WNhen the qualt frction was 1%,PBvalue of the max nonseizure load was 745 N.The main fditives of the concenraedliud would have higher infuence to the nitrie butadiene rubber than the polyuretane ruber. The modifed plan oil 1 an trehandlamine woud he hghy aircted oth rubber compatibility,because both of them had many polar groups and would have high permeability to the rubber.