The clamper is used for high temperature and high pressure glass miniature modules that is meant to judge the water drive oil effects and review in oil and gas exploration. On the base of the module and the center of the module cap, there are holes with steps and glass viewing window inside. Among the glass viewing window, module base and the inner wall of the central hole of the module's top cap, there is an O type sealing gasket. Between the module base and the top cap of the module, a high pressure confined chamber is formed. A high pressure pipe is fixed on the duct that is the head of the top cap of the module. Inside the high pressure confined chamber, there is a module bracket. A miniature transparent simulation porous module is pressed tightly against the module bracket. The invention can finish the simulative study of miniature transparent simulative porous module under the high temperature and high pressure of the strata, observing the module porosity and the liquid within the clamper clearly under the microscope. The experiment data surpass the current result in constant temperature and pressure.