Based on precise ephemeris provided by Wuhan University, BDS(BeiDou navigation satellite system) broadcast ephemeris errors were computed over the past three years from January 2013 to September 2015. The orbit errors, clock errors, and SISREs (signal-in-space user range errors) are presented and analyzed in different time periods for assessment. Results show that the radial accuracy of overall BDS satellites is less than 0.7 m and the normal accuracy of that is less than 1.4 m. Additionally, no obviously long term trends are found in both radial and normal errors. In term of along-track errors, the accuracies of IGSO(inclined geo synchronous orbit) and MEO(medium earth orbit) satellites are all less than 2.1 m and the along-track accuracy of GEO(geosynchronous earth orbit) is improved from 14 m to 8 m. The clock accuracies of GEO, IGSO and MEO are 6.3 ns, 4.7 ns and 4.3 ns respectively, and the clock accuracies of all satellites are more than 6 ns. The SISREs of all satellites are generally less than 2 m, and the SISREs of MEO satellites are relatively stable over the past 3 years. However, IGSO SISREs and GEO SISREs have some fluctuations in certain level.