The semi diurnal anisotropy of cosmic ray Intensity for four different groups of days i.e. 60 Quiet days (60 QD),120 Quiet days (120 QD), continuous Quiet days (CQD) and all days (AD) have been analysed with planetary index Ap, Interplanetary magnetic field (B) and solar wind velocity (V) for the period 1985 to 1995. The annual average values of semidiurnal amplitude and phase are observed to show quite similar variation within the statistical errors. The amplitude of semi diurnal anisotropy for all four types of days is confined over a low range(0.00 to 0.32%) and significant variations in interplanetary parameters (B,V& Ap) with cosmic ray intensity is observed as well. A large value of ratio of Ap index on AD with other group of days implies that the number of disturbed is in the year is comparatively large , then the disturbed days changes the general trend of variation of semi diurnal anisotropy and must be removed form all days so as to read a better trend study.