Abstract: The performance affecting factors of two-axis tracking method taking by parabolic trough collectors were analyzed，and various tracking methods under different geometrically constrained conditions were compared. A time-intime heat collection simulation program for parabolic trough collectors was developed based on Matlab and validated. According to the analysis results，the solar radiation per unit area received annually shows an increase trend followed by a slight decline as the altitude rises，and its uneven distribution is more prominent as the latitude increases. Under geometrically constrained conditions，when the ratio of side length is greater than 1，the solar radiation per unit area received annually（Q）of a one-axis tracking device displayed in north-south direction is higher than that of the device displayed in east-west direction.As the row number of one-axis tracking devices increases，the Q gradually increases and is generally higher than that of two-axis tracking devices. Under the selected geographic conditions，the annual emission reduction is proportional to Q，and the cost of solar radiation per unit area received annually by two-axis tracking method is the lowest among various methods，and the cost of the devices displayed in north-south direction is lower than that displayed in east-west direction.