Using the data observed with the Photoelectric Astrolabe Mark II of the Beijing Astronomical Observatory (PPA) during the period from 1982 to 1990, the Fourth Preliminary Catalogue of Stars (PACP4) have been Compiled. It consists of 1969 stars including 650 FK5 stars and 1319 GC stars. The mean precisions of position corrections in right ascension and declination are 4.1 ms and 0.067", respectively. The declinations are from +11 deg to +69 deg. The magnitudes are from 0.1 to 7.3. The mean epoch of observations is 1986.8.